linux/arch/x86/include/asm/hyperv_timer.h

/* SPDX-License-Identifier: GPL-2.0 */
#ifndef _ASM_X86_HYPERV_TIMER_H
#define _ASM_X86_HYPERV_TIMER_H

#include <asm/msr.h>

#define hv_get_raw_timer() rdtsc_ordered()

#endif
clocksource/drivers/hyper-v: Include asm/hyperv-tlfs.h not asm/mshyperv.h clocksource/hyperv_timer.h is included into the VDSO build. It includes asm/mshyperv.h which in turn includes the world and some more. This worked so far by chance, but any subtle change in the include chain results in a build breakage because VDSO builds are building user space libraries. Include asm/hyperv-tlfs.h instead which contains everything what the VDSO build needs except the hv_get_raw_timer() define. Move this define into a separate header file, which contains the prerequisites (msr.h) and is included by clocksource/hyperv_timer.h. Fixup drivers/hv/vmbus_drv.c which relies on the indirect include of asm/mshyperv.h. With that the VDSO build only pulls in the minimum requirements. Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Reviewed-by: Michael Kelley <mikelley@microsoft.com> Link: https://lore.kernel.org/r/87fsemtut0.ffs@tglx 2022-11-13 22:21:15 +01:00			`/* SPDX-License-Identifier: GPL-2.0 */`
			`#ifndef _ASM_X86_HYPERV_TIMER_H`
			`#define _ASM_X86_HYPERV_TIMER_H`

			`#include <asm/msr.h>`

			`#define hv_get_raw_timer() rdtsc_ordered()`

			`#endif`